the half-life of Aromasin is 8 hours, so EOD dosing does not work well for lots of people (this doesn’t mean that it doesn’t suppress estrogen for longer, as it does, but anyway…)
i would not get letro, as it isn’t gonna do anything that aromasin can’t for you, at least at this point.
i’d continue the 12.5 mg/day ED dosing of aromasin, and lower the nolva to 20 mg/day. see how that works for ya, and then go from there…
^by the way, that will work pretty well for PCT, too.